1 /* 2 * Copyright (C) 2012 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY 17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 */ 24 25 #ifndef WebTransformOperations_h 26 #define WebTransformOperations_h 27 28 class SkMatrix44; 29 30 #define WEB_TRANSFORM_OPERATIONS_IS_VIRTUAL 1 31 32 namespace WebKit { 33 34 class WebTransformOperations { 35 public: 36 virtual ~WebTransformOperations() { } 37 38 // Returns true if these operations can be blended. It will only return 39 // false if we must resort to matrix interpolation, and matrix interpolation 40 // fails (this can happen if either matrix cannot be decomposed). 41 virtual bool canBlendWith(const WebTransformOperations& other) const = 0; 42 43 virtual void appendTranslate(double x, double y, double z) = 0; 44 virtual void appendRotate(double x, double y, double z, double degrees) = 0; 45 virtual void appendScale(double x, double y, double z) = 0; 46 virtual void appendSkew(double x, double y) = 0; 47 virtual void appendPerspective(double depth) = 0; 48 virtual void appendMatrix(const SkMatrix44&) = 0; 49 virtual void appendIdentity() = 0; 50 51 virtual bool isIdentity() const = 0; 52 }; 53 54 } // namespace WebKit 55 56 #endif // WebTransformOperations_h 57 58
